(Supplemental Table 2) Plant characteristics, GHG fluxes, and soil chemical and microbial properties in experimental treatments in Alexandra Fiord
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| Autori principali: | , , , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2011
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| _version_ | 1867172327385464832 |
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| author | Lamb, Eric G Han, Sukkyun Lanoil, Brian D Henry, Gregory HR Brummell, Martin E Banerjee, Samiran Siciliano, Steven D |
| author_facet | Lamb, Eric G Han, Sukkyun Lanoil, Brian D Henry, Gregory HR Brummell, Martin E Banerjee, Samiran Siciliano, Steven D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We evaluated above- and belowground ecosystem changes in a 16 year, combined fertilization and warming experiment in a High Arctic tundra deciduous shrub heath (Alexandra Fiord, Ellesmere Island, NU, Canada). Soil emissions of the three key greenhouse gases (GHGs) (carbon dioxide, methane, and nitrous oxide) were measured in mid-July 2009 using soil respiration chambers attached to a FTIR system. Soil chemical and biochemical properties including Q10 values for CO2, CH4, and N2O, Bacteria and Archaea assemblage composition, and the diversity and prevalence of key nitrogen cycling genes including bacterial amoA, crenarchaeal amoA, and nosZ were measured. Warming and fertilization caused strong increases in plant community cover and height but had limited effects on GHG fluxes and no substantial effect on soil chemistry or biochemistry. Similarly, there was a surprising lack of directional shifts in the soil microbial community as a whole or any change at all in microbial functional groups associated with CH4 consumption or N2O cycling in any treatment. Thus, it appears that while warming and increased nutrient availability have strongly affected the plant community over the last 16 years, the belowground ecosystem has not yet responded. This resistance of the soil ecosystem has resulted in limited changes in GHG fluxes in response to the experimental treatments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_815197 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Supplemental Table 2) Plant characteristics, GHG fluxes, and soil chemical and microbial properties in experimental treatments in Alexandra Fiord Lamb, Eric G Han, Sukkyun Lanoil, Brian D Henry, Gregory HR Brummell, Martin E Banerjee, Samiran Siciliano, Steven D Activation energy; Alexandra_Fiord_sites; Ammonium; Ammonium, standard deviation; amoA gene, copy number in sediment; Carbon, organic, total; Carbon, organic, total, standard deviation; Carbon dioxide, flux; Carbon dioxide, standard deviation; CrenamoA gene, copy number in sediment; DATE/TIME; Denaturing gradient gel electrophoresis (DGGE); Ellesmere Island, Canadian Arctic Archipelago; Experimental treatment; Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015); HAND; Height; International Polar Year (2007-2008); IPY; Methane, flux; Methane, standard deviation; Nitrate; Nitrate, standard deviation; Nitrogen, organic, dissolved; Nitrogen, organic, standard deviation; Nitrous oxide, flux; Nitrous oxide, standard deviation; Nitrous oxide reductase gene, copy number in sediment; Number; Phosphate; Phosphate, standard deviation; Sampling by hand; Standard deviation We evaluated above- and belowground ecosystem changes in a 16 year, combined fertilization and warming experiment in a High Arctic tundra deciduous shrub heath (Alexandra Fiord, Ellesmere Island, NU, Canada). Soil emissions of the three key greenhouse gases (GHGs) (carbon dioxide, methane, and nitrous oxide) were measured in mid-July 2009 using soil respiration chambers attached to a FTIR system. Soil chemical and biochemical properties including Q10 values for CO2, CH4, and N2O, Bacteria and Archaea assemblage composition, and the diversity and prevalence of key nitrogen cycling genes including bacterial amoA, crenarchaeal amoA, and nosZ were measured. Warming and fertilization caused strong increases in plant community cover and height but had limited effects on GHG fluxes and no substantial effect on soil chemistry or biochemistry. Similarly, there was a surprising lack of directional shifts in the soil microbial community as a whole or any change at all in microbial functional groups associated with CH4 consumption or N2O cycling in any treatment. Thus, it appears that while warming and increased nutrient availability have strongly affected the plant community over the last 16 years, the belowground ecosystem has not yet responded. This resistance of the soil ecosystem has resulted in limited changes in GHG fluxes in response to the experimental treatments. |
| title | (Supplemental Table 2) Plant characteristics, GHG fluxes, and soil chemical and microbial properties in experimental treatments in Alexandra Fiord |
| topic | Activation energy; Alexandra_Fiord_sites; Ammonium; Ammonium, standard deviation; amoA gene, copy number in sediment; Carbon, organic, total; Carbon, organic, total, standard deviation; Carbon dioxide, flux; Carbon dioxide, standard deviation; CrenamoA gene, copy number in sediment; DATE/TIME; Denaturing gradient gel electrophoresis (DGGE); Ellesmere Island, Canadian Arctic Archipelago; Experimental treatment; Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015); HAND; Height; International Polar Year (2007-2008); IPY; Methane, flux; Methane, standard deviation; Nitrate; Nitrate, standard deviation; Nitrogen, organic, dissolved; Nitrogen, organic, standard deviation; Nitrous oxide, flux; Nitrous oxide, standard deviation; Nitrous oxide reductase gene, copy number in sediment; Number; Phosphate; Phosphate, standard deviation; Sampling by hand; Standard deviation |
| url | https://doi.org/10.1594/PANGAEA.815197 |